Q&A - PSLE Science

[Michaelia0816]

Thx Charsen.

[charsen]

Hi robbertpattinsonidle,

Gravitational force is the same.
For example,your friend lives in the 12 th floor and you live in the 39 th floor.
If gravity is the highest in the 39 floor,some of your friends items would be floating in the air.The gravity pull in the earth is the same all the time.Hence, the gravity pull is the same in the 17 floor and 39 floor.Therefore,the gravitational force is acting the same on the ball no matter ho high it is
.Gravitatinal potential energy is another story.
Cheers

[Robertpattinsonidle]

this question part a i got it right. but for part b, i said that the answer is graph c. my science teacher said that it was graph b. but the answer key says graph a. what is the correct answer????? and what is the explanation??? aaargh... its so difficult!!! :skeptical: http://i49.tinypic.com/hw9xdk.jpg\"> http://i47.tinypic.com/s5eels.jpg\">

[Studious Alien]

My answer would be c too... But I'm not an expert

[AceTutors123]

verykiasu2010's answer makes the most sense :salute:

[Way2GO]

The favourable property to look for in the safety vest in this question is visibility over a good range of distances. Only graph C plateau off into the distance. A & B visibility ends abruptly at certain unmentioned distances.

Answer is C.
But I am no science teacher, please confirm with another independent source.

[Michaelia0816]

I have a question which I am unsure of,


Do pond skaters eats plants ( like algae)?

[Michaelia0816]

Pls help,

http://t.co/q9WybVC6

Is the answer 2?

[elkniwt]

Hi,


Like to check if mushrooms are micro-organisms?

The links below seem to indicate they are :
http://archives.microbeworld.org/microbes/fungi/

But aren't micro-organisms microscopic? :?

Asked this based on this qn from RGS :
http://i47.tinypic.com/e83mn5.jpg\">

TIA.

[Robertpattinsonidle]

pls help me with this question. http://i49.tinypic.com/29qb05w.jpg\">